English verb conjugation
COULD LEMMATIZE

Regular verb: lemmatize - lemmatized - lemmatized

Affirmation

Simple form	V-ing form
I could lemmatize you could lemmatize he could lemmatize we could lemmatize you could lemmatize they could lemmatize	I could be lemmatizing you could be lemmatizing he could be lemmatizing we could be lemmatizing you could be lemmatizing they could be lemmatizing
Perfect	V-ing perfect
I could have lemmatized you could have lemmatized he could have lemmatized we could have lemmatized you could have lemmatized they could have lemmatized	I could have been lemmatizing you could have been lemmatizing he could have been lemmatizing we could have been lemmatizing you could have been lemmatizing they could have been lemmatizing

Negation

Simple form	V-ing form
I couldn't lemmatize you couldn't lemmatize he couldn't lemmatize we couldn't lemmatize you couldn't lemmatize they couldn't lemmatize	I couldn't be lemmatizing you couldn't be lemmatizing he couldn't be lemmatizing we couldn't be lemmatizing you couldn't be lemmatizing they couldn't be lemmatizing
Perfect	V-ing perfect
I couldn't have lemmatized you couldn't have lemmatized he couldn't have lemmatized we couldn't have lemmatized you couldn't have lemmatized they couldn't have lemmatized	I couldn't have been lemmatizing you couldn't have been lemmatizing he couldn't have been lemmatizing we couldn't have been lemmatizing you couldn't have been lemmatizing they couldn't have been lemmatizing

Interrogative form

Simple form	V-ing form
could I lemmatize? could you lemmatize? could he lemmatize? could we lemmatize? could you lemmatize? could they lemmatize?	could I be lemmatizing? could you be lemmatizing? could he be lemmatizing? could we be lemmatizing? could you be lemmatizing? could they be lemmatizing?
Perfect	V-ing perfect
could I have lemmatized? could you have lemmatized? could he have lemmatized? could we have lemmatized? could you have lemmatized? could they have lemmatized?	could I have been lemmatizing? could you have been lemmatizing? could he have been lemmatizing? could we have been lemmatizing? could you have been lemmatizing? could they have been lemmatizing?

Interro-negative form

Simple form	V-ing form
couldn't I lemmatize? couldn't you lemmatize? couldn't he lemmatize? couldn't we lemmatize? couldn't you lemmatize? couldn't they lemmatize?	couldn't I be lemmatizing? couldn't you be lemmatizing? couldn't he be lemmatizing? couldn't we be lemmatizing? couldn't you be lemmatizing? couldn't they be lemmatizing?
Perfect	V-ing perfect
couldn't I have lemmatized? couldn't you have lemmatized? couldn't he have lemmatized? couldn't we have lemmatized? couldn't you have lemmatized? couldn't they have lemmatized?	couldn't I have been lemmatizing? couldn't you have been lemmatizing? couldn't he have been lemmatizing? couldn't we have been lemmatizing? couldn't you have been lemmatizing? couldn't they have been lemmatizing?